Career
He was the brother of James FitzJames, 1st Duke of Berwick, the French Marshal. They had a posthumous daughter, Lady Christine Marie Jacqueline Henriette FitzJames, born 29 May 1703 at Bagnols sur Cèze, Languedoc, France, who became a nun. His widow, Marie Gabrielle d"Audibert de Lussan, Duchess of Albemarle, remarried in May 1707, at Saint-Germain-en-Laye, John Drummond, Marquess of Forth, later 2nd Duke of Melfort (1682–1754)).
FitzJames was created Duke of Albemarle, together with the subsidiary titles of Earl of Rochford and Baron Romney, by his father on 13 January 1696, but the title is only recognized by Jacobites.
He was also appointed the Grand Prior of the revived Priory of the English Commandery of the Sovereign Military Order of Street.John of Jerusalem, Rhodes and Malta, known as the Knights of Malta.